Functional phytoplankton distribution predicts the environmental variability between two subtropical rivers

Aquino, Camila Akemy Nabeshima; Bortolini, Jascieli Carla; Favaretto, Cinthia Coutinho Rosa; Sebastién, Nyamien Yahaut; Bueno, Norma Catarina

doi:10.1007/s40415-018-0503-7

Cited by 4 publications

(3 citation statements)

References 48 publications

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“…Eutetramorus tetrasporus, Kirchneriella dianae, Monoraphidium circinale, M. komarkovae, M. pusillum, Actinastrum hantzschii, and Closteriopsis acicularis. Floristic studies are the basis for understanding the biogeographic distribution of taxa, as well as being important in identifying measures for the management and conservation of biodiversity (Aquino et al 2018). Although this study is of a qualitative nature, we were able to determine the occurrence of taxa and its local environmental conditions, as well as increase knowledge of the phycological flora of western Paraná state.…”

Section: Closteriopsis Acicularis (Chodat) Jhbelchermentioning

confidence: 98%

“…1). It is approximately 8.73 km long and is located in a rural area close to a sewage collection and treatment system (South Station -SANEPAR), receiving a large input of pretreatment material from this facility, in addition to suffering agricultural influences (Orssatto et al 2009;Aquino et al 2018). The sampling station has scant ciliary vegetation, in addition to silting for some months.…”

Section: Study Areamentioning

confidence: 99%

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Planktonic chlorophyceans of a Brazilian subtropical river: taxonomy and ecological aspects

et al. 2021

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Given the extreme importance of understanding biodiversity in the contemporary context, this study performed a taxonomic survey of planktonic green algae from a subtropical river in Paraná state, broadening knowledge of the group’s geographic distribution and the environmental conditions related to its occurrence. Monthly samplings of phytoplanktonic material were carried out from February 2015 to January 2016, resulting in the identification of 26 taxa belonging to the classes Chlorophyceae and Trebouxiophyceae, distributed among 16 genera and six taxonomic families. Among the taxa identified, seven are new citations for Paraná.

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Section: Closteriopsis Acicularis (Chodat) Jhbelchermentioning

confidence: 98%

Section: Study Areamentioning

confidence: 99%

Planktonic chlorophyceans of a Brazilian subtropical river: taxonomy and ecological aspects

et al. 2021

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“…ecological dimensions of the niche) and impair the understanding of clumpy patterns (Barabás et al 2013, D'Andrea et al 2018. The use of multiple traits emerges as a powerful tool to disentangle phytoplankton functional structure and evaluate competing hypotheses (Reynolds et al 2014, Chen et al 2015, Bortolini and Bueno 2017, Aquino et al 2018. Morphology-based functional groups (MBFG) classification of phytoplankton species (Kruk et al 2010) is a multidimensional combination of morphological traits that cluster organisms into seven groups with similar physiology and ecological responses, potentially overcoming the limitations of using a single trait dimension only.…”

Section: Introductionmentioning

confidence: 99%

Clumpy coexistence in phytoplankton: the role of functional similarity in community assembly

Graco-Roza

Segura²,

Kruk

et al. 2021

Oikos

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Emergent neutrality (EN) suggests that species must be sufficiently similar or sufficiently different in their niches to avoid interspecific competition. Such a scenario results in a transient pattern with clumps and gaps of species abundance along the niche axis (e.g. represented by body size). From this perspective, clumps are groups of coexisting species with negligible fitness differences and stochastic abundance fluctuations. Plankton is an excellent model system for developing and testing ecological theories, especially those related to size structure and species coexistence. We tested EN predictions using the phytoplankton community along the course of a tropical river considering 1) body size structure, 2) functional clustering of species in terms of morphology-based functional groups (MBFG) and 3) the functional similarity among species concerning their functional traits. Two main clumps in the body size axis (clump I and II) were conspicuous through time and were detected in different stretches of the river. Clump I comprised medium-sized species from the MBFGs IV, V and VI while clump II included large-bodied species from the MBFGs V and VI. Pairwise differences in species biovolume correlated with species functional similarity when the whole species pool was considered, but not among species within the same clump. Although clumps comprised multiple MBFGs, the dominant species within the clump belonged always to the same MBFG. Also, within-clump species biovolume increased with functional distinctiveness considering both seasons and stretches, except the lower course. These results suggest that species within clumps behave in a quasi-neutral state, but even minor shifts in trait composition may affect species biovolume. Our findings point that EN belongs to the plausible mechanisms explaining community assembly in river ecosystems.

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Clumpy coexistence in phytoplankton: The role of functional similarity in community assembly

Graco-Roza

Segura

Kruk

et al. 2019

Preprint

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Emergent neutrality (EN) suggests that species must be sufficiently similar or sufficiently different in their niches to avoid interspecific competition. Such a scenario results in species-rich aggregation patterns termed clumps. Plankton has been a popular model system in developing and testing ecological theories, especially size structure and species coexistence. We tested EN predictions for the phytoplankton community along the course of a tropical river considering body size structure and multidimensional trait similarity in terms of morphology-based functional groups (MBFG). We found two stable main clumps in body size with species pertaining to three MBFGs. Amongspecies differences in biovolume were driven by their functional redundancy at the clump level but not at the whole community level. Furthermore, the dominance of functionally redundant species at the clump level varied stochastically as expected under EN. The relative biovolume of species was related to species functional distinctiveness at the clump level. Our findings suggest that species with similar traits are selected under given environmental conditions, but even minor shifts in trait combination may lead to reproductive success.

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Functional phytoplankton distribution predicts the environmental variability between two subtropical rivers

Cited by 4 publications

References 48 publications

Planktonic chlorophyceans of a Brazilian subtropical river: taxonomy and ecological aspects

Planktonic chlorophyceans of a Brazilian subtropical river: taxonomy and ecological aspects

Clumpy coexistence in phytoplankton: the role of functional similarity in community assembly

Clumpy coexistence in phytoplankton: The role of functional similarity in community assembly

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